Lab.gruppen PLM series Operation Manual

Also see for PLM 10000Q: Supplementary guide User manual addendum Specifications Quick start Technical data

Contents

Lab.gruppen PLM series Operation Manual Manual pdf 72 page image

72 PLM Series Operation Manual rev 1.1.310. Back Panel Interface10.2.2 Digital inputs and linksAES/EBUINPUT 1-2 LINK 1-2Figure 10.2.2: Rear panelAES digital connectorsThe AES/EBU digital audio input is on an XLR3F connector, which is directly paralleled to the adjacentXLR3M AES/EBU Link connector.The AES/EBU digital audio format uses a balanced electrical configuration similar to balanced analog audio.The pinout is shown in table 10-2.AES/EBU Wiring TablePin 1 Ground/ShieldPin 2 Hot (+)Pin 3 Cold (-)Table 10.2.2: AES connector wiring and pin outNote that this is the only possible method of wiring – there is no equivalent of an “unbalanced” connectionin the digital domain.The AES/EBU signal format carries 2 channels of audio (plus other control data) on a single cable/connector.Selection of Ch 1 or Ch 2 is performed within the digital processing section of the PLM and is controlledfrom the menu system. See section 9.12.3.1 for full details.The AES/EBU Link connector may be used to “daisy-chain” the inputs of multiple PLMs together. Unlikedaisy-chaining of analog inputs, attention must be paid to line termination. When daisy-chaining PLMstogether, only the “last” PLM in the chain should be set to Terminated. All other PLMs should be set toUnterminated. See section 9.12.3.3 for full details of setting input termination.As with balanced analog audio, there is a finite limit to how many PLMs may have their AES/EBU inputs“daisy-chained” together. The practical limit will be determined by cable type and length as well as theoutput circuit of the driving source. It may be necessary to employ an AES/EBU line driver or distributionamplifier to achieve reliable results in some situations.Please read the warnings regarding the connectionof digital audio signals in section 6.2.1 beforeattempting to use the AES/EBU input.